Vocalizing muffler



pt. 23, 930. s. G. 'GERLACH, JR 1,776,534

VOCALIZING MUFFLER I Filed Jan. 15, 1928 Patented Sept. 23, 1930 v i i I UNITED STATES PATENT OFFICE. I 1

Application filed January 13, 1928. .Serial No. 246,583.

My invention relates to a device for muf- 11 arepreferably arranged at substantially fling vocal sounds, and an object of my inright angles to the wall of the case and the vention, among others, is to provide a mufiler baflles from opposite walls project toward which may be readily adapted for use to each other and into the space between the muflie vocal sounds while, at the same time, barriers 10. The outeredges of the bafiles permitting free use of the vocal organs. preferably terminate short of the longi- One form of device embodying my inventudinal center of the case and as shown in tion and in the construction and use of which 7 Fig. 3 and F ig. 4 of the drawings. The mouth the objects herein set out, as well as others, or outlet 7 is preferably reduced in size. 7

10 maybe obtained, is illustrated in the accom- I If desireda stand or support for the mufller f panying drawings in which may be provided, this comprising a basef12" Figure 1 is a side view of my improved .having'a standard or post 13 rising therefrom muflier illustrating its manner of use. and with its upper end passed into a hole in Figure 2 is a view in central lengthwise a lug 14 onthe side of the case. -A set screw section through the same. 15 may be employed to secure the post 13 c5 Figure 3 is a view in elevation looking from within thelugr a point located at right angles from the point It will be noted that this structure p roof view of Figure 1. vides a'means whereby the vocal sounds pro- Figure 4 is a view in cross section on the duced by a person in the act of practicing :0 plane denoted by the dotted line 4-4 of Figsinging fmay be effectually subdued the ure 3. a sounds. passing into the'lcase and being eifec In the accompanying drawings the numeral tually broken up by contact with the barriers 5 indicates the case or shell of my improved and baflles that cause such sounds to pass in mufller which is of tubular form and which a devious course through the case and the 5 maybe of any suitable shape in cross section, sound currents being divided and broken up that herein shown being more or less recso thatbut l1ttle sound will be perceptible at tangular in this respect. This case comprises little distance from the mufiier. D a mufiier section 6 having an outlet 7 and In acco d ce e p o on of t a mouthpiece 8 preferably located at an angle patent statutes I have described the pun- 30 to the section 6 and having an inlet chamciples of operation of my invention, together her 9. This mouthpiece may be shaped to-fwith the device which now consider to fit about the mouth and face of theuser, as represent the best embod ment thereof, but shown in Fig. 1, and the chamber 9 will be Idesire to have t understood that the deof such size as to permit substantially a full vice shown is only lllustrative and that the 35 volume of vocal sounds. invention may be carried out by other, means WVithin the case and preferably in the secand applied to uses other than those above tion 6 I provide barriers 10 that are prefset out. erably of A shape, as shown in Fig. 3, these I cla1m r barriers being arranged on opposite sides 1. A vocallzing mufiler lncluding a case of of the chamber in the section 6 in staggered tubular form having a mouthpiece at one end relation and projecting toward the longiwithin wlnch the mouth and part of the face tudinal section of the center, but preferably of a person may be placed, sa1 d case also havterminating short of such center or axis. Any in g an outlet, barrlers pro ect1ng from opposuitable number of these barriers may be emsite walls of the case toward each other with i ployed. a space between them, and baflies different in In addition to the barriers 10 I also proshape from the barriers and extendmg from vide baflles 11 extending toward the center opposite walls of the case with a space beof the case from opposite walls and in a directween them. 1 tion substantially at right angles to that in 2. A vocahzing mufl'ler for materlally rewhich the barriers 10 extend. These bafiles ducing said volume including a case of tubular form having a mouthpiece at one end and V a mufiier section through Which all of the sound must pass arranged at an angle to the mouthpiece with an outlet therefrom, and 5 means Within the muiiler section for efiecting a devious course of sound Waves therein from the mouthpiece to the outlet. 5 3. A volcalizing muiiler including a oase'of tubular form having amouthpiece at one end [0 and an outlet at the opposite end, barriers of angular form in section projecting from op I posite Walls of the casein staggered relation, and battles projecting from opposite Walls of the case into the interior thereof at substantially right angles to the barriers.

' 4. A vocalizing muflier includinga case of tubular form and embodying a mouthpiece, and a muffler section located at an angle to said mouthpiece, and barriers of angular Q0 shape in section projecting from opposite Walls of the case in staggered relation.

5. A vocalizing muffler including a'case of tubular form having a mouthpiece at one A end and an outlet atthe opposite end, barriers 1.5 of angular shape in section projecting from opposite Walls of the case in staggered relation, and battles projecting from opposite Walls of the case at right angles to said barriers, said battles being located between said so barriers. 6. A vocalizing mufiier including a case of tubular form having a mouthpiece at one end i and an outlet at the opposite end, barriers of I angular shape in section projecting from op- '35 posite Walls of the case in staggered relation and terminating short of the longitudinal center thereof, and bafiiesprojecting from opositewa-lls of the case at right angles to said v arriers and into the space between the bar- 40 riers and terminating short of the longitudinal center thereof, thereby creating a clear opening through the case. 7 7, A vocalizing' muflier for materially res ducing sound volume including a tubular casing having a horizontally opening mouthpiece] Within Which the mouth and part of the face ofa person may be placed, 7 said muffler also including a perpendicular muffler section, a vertical'support, and means for vertically adjust-ably mounting the casing upon said support.

STEPHEN G. GERLACH, JR. 

